Domino synthesis of 2-arylbenzo[b]furans by copper(II)-catalyzed coupling of o-iodophenols and aryl acetylenes
作者:E.A. Jaseer、D.J.C. Prasad、Govindasamy Sekar
DOI:10.1016/j.tet.2010.01.026
日期:2010.3
range of 2-arylbenzo[b]furans are synthesized through domino intermolecular C(aryl)–C(alkynyl) bond formation followed by intramolecular C(alkynyl)–O bond forming cyclization via copper(II)-catalyzed coupling of o-iodophenols and aryl terminal acetylenes. This method requires neither expensive palladium catalyst nor oxophilic phosphine ligands, can tolerate different functional groups. The methodology
An efficient intermolecular C(aryl)–S bond forming reaction catalyzed by BINAM–copper(II) complex
作者:D.J.C. Prasad、Ajay B. Naidu、G. Sekar
DOI:10.1016/j.tetlet.2009.01.022
日期:2009.4
A wide range of diaryl thioethers and aryl alkyl thioethers; are synthesized from the corresponding aryl iodides and aromatic/aliphatic thiols through Ullmann type intermolecular coupling reactions in the presence of a catalytic amount of easily available BINAM-Cu(OTf)(2) complex. Less reactive aryl bromides have also been shown to react with thiols under identical reaction conditions to give good yields of the thioethers without increasing the reaction temperature and time. (C) 2009 Elsevier Ltd. All rights reserved.
Use of carboxylic acids as chiral solvating agents for the determination of optical purity of chiral amines by NMR spectroscopy
作者:Scott C. Benson、Ping Cai、Marcelo Colon、Mohammed A. Haiza、Maritherese Tokles、John K. Snyder
DOI:10.1021/jo00257a024
日期:1988.10
Solution conformation of two C2-symmetric amino derivatives of 1,1'-binaphthalene by circular dichroism and liquid crystal technique
作者:Carlo Rosini、Livia Franzini、Piero Salvadori、Gian Piero Spada
DOI:10.1021/jo00051a028
日期:1992.12
The solution conformation of two C2-symmetric 1,1'-binaphthyl compounds (N,N,N',N'-tetramethyl-[1,1'-binaphthalene]-2,2'-diamine (1) and N,N'-dimethyl-[1,1'-binaphthalene]-2,2'-diamine (2) has been studied by MMX calculations, analysis of the absorption and CD spectra, and induction of cholesteric mesophases in nematic liquid crystals. All these methods indicate that 1 prefers a ciscoid conformation and that 2 assumes a conformation where the two naphthyl moieties are quasi-perpendicular.